The Optimal Hydraulic Design of Centrifugal Impeller Using Genetic Algorithm with BVF

Table 4

Grid independence analysis.

Cell number	625173	841281	1129299	1358154	1543701
Head coefficient	0.836	0.843	0.849	0.853	0.856
Efficiency	0.7573	0.7698	0.7743	0.7763	0.7780